fix(ivy): tokenize escaped new lines in inline templates - #28844

@petebacondarwin Yes, that's what I think as well, but I'm not sure what should be the proper way to fix it... _processEscapeSequence is consuming the first \ (here https://github.com/angular/angular/blob/master/packages/compiler/src/ml_parser/lexer.ts#L537), so this._attemptCharCodeUntilFn(isNameEnd) does not stop until the $LF just after...

Yes. The index should stay at the start of the character. We need to change the _processEscapeSequence method so that we only update that index when we move to the next char.

Also the fix you have would not help for longer escape sequences like variable Unicode ones.

@petebacondarwin I think I understand what you mean and attempted a proper fix. The amended commit now has a dedicated index to track the advanced during escape sequences, and the index only catches up when needed.

Superseeded by #28978

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